content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2013, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
   * Other names may be trademarks of their respective owners.]
   *
   * -------------
   * LabelIRS.java
   * -------------
   * (C) Copyright 2013, by Michael Zinsmaier.
   *
   * Original Author:  Michael Zinsmaier;
   * Contributor(s):   -;
   *
   * Changes
   * -------
   * 17-Sep-2013 : Version 1 (MZ);
   *
   */
  
  package org.jfree.chart.renderer.item;
  
  import java.awt.Font;
  import java.io.Serializable;
  
  import org.jfree.chart.labels.ItemLabelPosition;
  import org.jfree.chart.renderer.AbstractRenderer;
  
  /**
   * Defines an interface to control the rendering of labels for individual items.
   * Implementing classes can be used together with subclasses of 
   * {@link AbstractRenderer} to control the rendering process.<br>
   * Works however only if the descendant of {@link AbstractRenderer} uses per 
   * item methods like {@link AbstractRenderer#getItemLabelFont(int, int)}
   * 
   * @author zinsmaie
   */
  public interface LabelIRS extends Serializable {
  
      /**
       * Specifies an individual item by row, column and returns the font for its
       * label.
       * 
       * @param row  the row (or series) index (zero-based).
       * @param column  the column (or category) index (zero-based).
       * 
       * @return a Font (never <code>null<code>)
       */
      public Font getItemLabelFont(int row, int column);
  
      /**
       * Specifies an individual item by row, column and returns true if its 
       * label should be rendered.
       * 
       * @param row  the row (or series) index (zero-based).
       * @param column  the column (or category) index (zero-based).
       * 
       * @return true if the label should be rendered
       */
      public boolean isItemLabelVisible(int row, int column);
  
      /**
       * Specifies an individual item by row, column and returns the label 
       * position. 
       * 
       * @param row  the row (or series) index (zero-based).
       * @param column  the column (or category) index (zero-based).
       * 
       * @return The item label position (never <code>null</code>).
       */
      public ItemLabelPosition getPositiveItemLabelPosition(int row, int column);
  
      /**
       * Specifies an individual item by row, column and returns the label 
       * position. 
       * 
       * @param row  the row (or series) index (zero-based).
       * @param column  the column (or category) index (zero-based).
       * 
       * @return The item label position (never <code>null</code>).
       */
      public ItemLabelPosition getNegativeItemLabelPosition(int row, int column);
  
  }
  